Respuesta :

Using angle sum property.

[tex]\\ \sf\longmapsto 2x+14+64+76=180[/tex]

[tex]\\ \sf\longmapsto 2x+144=180[/tex]

[tex]\\ \sf\longmapsto 2x=36[/tex]

[tex]\\ \sf\longmapsto x=18[/tex]

Answer:

x = 13

Step-by-step explanation:

1. Things you need to know:

Did you know all angels in a triangle sum up to 180 degree!

2.  Make your equation

[tex](2x + 14) + (64 + 76) = 180[/tex]

3.  Simplify

[tex]2x + 14 + 140 = 180[/tex]

[tex]2x + 154 = 180[/tex]

3. Solve

[tex]2x + 154 - 154 = 180 - 154[/tex]

[tex]2x / 2 = 26 / 2[/tex]

[tex]x = 13[/tex]

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